v0.5.4

Added

• BEAM session snapshots now carry activity metadata including last activity time, current activity start time, and turn count.
• BEAM session trees now show token/cost usage summaries and recursive nested child status aggregation.
• Added TUI/session debugging workflow notes for monitored tmux/asciinema playground runs.

Changed

• Elixir tool call previews normalize multiline arguments into a single pi-style preview line.
• Completed BEAM session trees remain transcript-first while live/running snapshots stay widget-only.

Fixed

• Removed repeated live elixir-sessions transcript entries that caused TUI artifacts during subagent startup.
• Fixed nested BEAM session summary branch alignment in compact trees.